Tag: networking

The first time I worked on IPv6 was in 2000 in my master’s degree thesis where I started an implementation of Mobile IP based on IPv6 in Linux Redhat. Over a decade later, IPv6 has not really taken off, even though we hear stories about the IPv4 address space running out and I have yet to see an embedded device using anything else than IPv4. APNIC Ran out of IPv4 However, this may be about the change as on the 15th of April 2011, Japan Network Information Center (JPNIC) announced that APNIC (Asia Pacific Network Information Centre) ran out of IPv4 addresses. They will still try to make it last longer by reusing previously allocated IPv4 and an “IPv4 address transfer system” whose details will be made available later. You can also see a chart based on IANA (Internet Assigned Numbers Authority) data that shows this is a problem right now. If we have to update all devices to support …

Just a short post to show how to scan the open ports of a remote machine on the local network: sudo nmap -sS 10.10.10.123 Starting nmap 3.81 ( http://www.insecure.org/nmap/ ) at 2010-04-28 16:00 HKT Interesting ports on 10.10.10.123: (The 1660 ports scanned but not shown below are in state: filtered) PORT STATE SERVICE 69/tcp closed tftp 139/tcp open netbios-ssn 445/tcp open microsoft-ds MAC Address: 00:50:FC:B1:E9:70 (Edimax Technology CO.) Nmap finished: 1 IP address (1 host up) scanned in 25.252 seconds Support CNX Software – Donate via PayPal or become a Patron on Patreon